"Take your light into the caves beneath the earth and see what will happen"
In the beginning, there was nothing. No stars, no moon, nothing dead or alive. Which was a huge problem for the earth. Baiame needed to wake someone to make his earth come alive, and he chose Yhi.
Yhi must understand how the earth works. She must listen to the voice in her head (Baiame), telling her somewhat how to bring the earth to life. She must understand and believe in herself to understand the struggles of the living things that are found in the caves and has to figure out a way to save them.
While in the caves Yhi discovers all the insects and animals who are living beneath the earth who swarm her. So she lead them out of the caves into the grass, leaves and flowers.